Device to prevent vibration of bobbins



Nov. 10, 1925- I o. w. RICHARDSON DEVICE TO PREVENT VIBRATION OF BOBBINSFiled April 1,

iiig

Patented Nov. 10, '1925.

UNITED STATES PATENT/OFFICE. A

OscAR w. RICHARDSON, 0F WORCES ER,MASSAC USETTS, AsSIeNOR To: cRO P'roNa KNOWLES VLOOM WORKS, or WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

DEVICEYTO PREVENT VIBRATION or BOBBINS.

Application filed April 1,1924. Serial No. 703,545.

To all whom it may concern: 1

Be it known that 1,0SOAR W. RICHARD- soN, a citizen of the UnitedStates, residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented new and useful Devices to Prevent Vibrationof Bobbins, of which'the following is a specification. This inventionrelates to improvements in weft replenishing mechanisms for looms andmore particularly to devices for preventing the'rotation of bobbins ontheir axes as they await transfer.

In the usual type ofmulti-color weft replenishing mechanisms the bobbinsare arranged loosely in vertical stacks and are discharged one by one tomove to transfer position. It has been found that where the yarn is lineso that transfers are relatively infrequent the filling ends whichextend to the thread holder become entangled due to the rotation of thebobbins and breakage of the thread is likely to result at the time oftransfer.

In my co-pending application, Serial No.

602,625 I have shown a weft replenishing mechanism having a plurality ofcompartments, each of which is formed with one fixed wall and onemovable wall, the movable walls of the compartments being formed of thinspring stock riveted at their lower ends to the frame of thereplenishing mechanism. These movable walls are under control of thereplenishing mechanism and are moved laterally with respect to the axesof the bobbins and engage the heads of the latter so that they are heldagainst the fixed walls of the'oompartment and thus restrained againstrotation or vibration.

Because of the fact that the walls ofthe compartment disclosed in myaforesaid application are formed of resilient 'material the bobbins arepermitted a certain rotation which is more noticeable on the Outer com-'partments of the mechanism. Also, the: spring walls are likely to becomedeformed and protrude into the path of and interfere with the falling ofthe bobbins in thereplenishing mechanism. It is one object of 'myinvention to afford more reliable means ter against the fixed wall ofthe compartment. Such a construction provides for exerting greater andmore uniform pressure on all of the -bobb ns 1n the compartment duringnormal running operation of the loom and also permits immedlate releaseof I all bobbins-at the time of indication of substantial weftexhaustion.

Another object of my invention is to provide mechanism which will ineffect divide each of the vertical bobbincompartments into a series ofsub-compartments, one for more easily controlled .and restrained.

A still further object of my invention is to provide each bobbincompartment with a pivotal wall which is held yieldingly in bobbinrestraining position by means independent Of the other pivotal walls sothat the number of bobbins in one compartment will not affect thepressure of the walls in the neighboring compartments.

lVith these and other objects in view which will appear as thedescription'proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying'drawing wherein I have shown two forms ofmyinvention.

Fig. 11s aside elevation of a two'color I weft replenishingmechanismvhaving my invention applied thereto and shown as viewed fromthe central portion Of the loom,

Fig. 2 is a vertical section taken on line .22 of Fig. 1,

Fig. 3 is ahorizontal section taken on line 33 of Fig. l,

Fig. 4 is a perspective view of the upper portion of the compartmentsformingpart of the replenishing mechanism, and I I Fig. 5 shows aportion of a modified form of movable wall.

Referring to Figs. 1 to 4 it will be seen that I have provided a Weftreplenishin mechanism having a frame 10 on whic are mounted slides 11and 12 which are adapted for vertical motion in upper and lower guides13 and 14 respectively. The lower ends ofthe slides are slotted as at 15and 16, respectively,'to cooperate with cra-' dles 17 and. 18,respectively, which control the discharge'of the bobbins. Slide 11' isprovided with upper and lower lugs 19 and v 20, respectively, and slide12 is similarly formed with lugs 21 and 22, respectively. Mounted forlongitudinal and angular mo- .tion with respect to the slides 11 and 12is a rod 23 guided in bearings 24 and having secured thereto fingers 25,one of which is shown in Fig. 2. These fingers are posi-i tioned forengagement one by one, with the lugs on the vertical slides 11 and 12and the rod 23 is moved longitudinally under control of the boX motionto bring the proper finger in operative relationship with the slidecorresponding to the active shuttle. The frame 10 is provided with fiXcdwalls 26 and 27, respectively, which form the outer boundaries ofcompartments 28 and 29, respectively. The mechanism thus far describedis of the usual construction and for a more complete showing anddescrip.

,cated in Fig. 1.

partments.

My invention relates more particularly to the construction and mountingof the movable walls which form the inner boundaries of the compartments28 and 29. Referring to Fig. 1 it will be seen that I have providedwalls 40 and 41 which are pivoted at their lower ends to stationaryparts of the mechanism, as at 42 and 43', respectively. These walls are.substantially the same width as .the fixed walls 26 and 27 and extendup wardly from their pivots to the upper portion of the replenishingmechanism as indi- As shown in Fig. 4,the surfaces of the movable wallsadjacent their respective compartments are formed with corrugations 44and 45, respectively, which are shallow at the lower ends of the wallsand are madejdeep'er toward the top, the depth of the corrugations beingapproximately proportional to their distance from the pivot of the wall.

Secured to the 'walls adjacent the upper portions thereof are cam plates46 and 47, respectively, which are rigidlysecured' to the walls andextend from the latter through. an opening 48' formed inthe frame of thereplenishing mechanism to the inner side of said mechanism. Springs 49and 50, are connected to the cam plates 46- and 47, respectively, andserve to hold the walls against the bobbins in the associated com- Asshown in Fig. 3 each cam plate is formed with a portion 51'so located asto engage the adjacent wall of the opening 4.8 when thecorresponding Icompartment is empty, in this way forming a stop for the wall. 7

In'order to provide for slight irregularities in the. bobbins a modifiedform of wall may be employed such asshown in Fig. 5, where I haveindicated the corrugated surface of the wall as being covered withayielding surface 60such as rubber, felt, leather or other flexiblecompressible material.

In the normal operation of the loom the vertical slides are in lowerposition as indicated by slide 11 in Fig. 1 and the movable walls areheld against Zthe. corresponding stack of bobbins, each, bobbin beingreceived by one of the sub-compartments formed by the corrugations so asto be held against rotation and also against vertical motion. Atindication of substantial weft exhaustion the slide corresponding to theindicating shuttle will be raised to the position indicated by slide 12in Fig. 1 as set forth in the aforesaid Patent'No. 1,030,748. WVlien theslide is raised, the upper p'ontiontl'iereof will e-ngage'thecorresponding cam and move the wall attached thereto away from thebobbins. to permit the latter to fall freely to meet the requirements ofthe replenishing mechanism. Theraised slide. will remain in upperposition until'the indicating shuttie returns to the replenishing sideof the loom, at which time the slide wil-lbe lowered to move out ofcontact with the cam and thus release the pivoted wall so thatthe samecan move into c ntact with the associated stack of bobbins. V i

From the foregoing it will'be seen that I have provided each bobbincompartment with a rigid pivoted wall normally held yieldingly againstthe bobbins of the corresponding compartment to prevent rotation thereofand controlled by the replenishing mechanism to release the bobbins atthe, proper time to permit them to fall freely to the nextposition'before again being engaged ml by the wall. Also, the movable walls areprovided with depressions which define a sub-compartment for each ofthe: bobbins so that the latter are engaged by a. larger surfacethan isthe case where the wall is formed with a planate face. Furthermore, thepivoted walls are held in bobbin restraining position by independentmeans so that the. bobbins of any compartment are not in-ter fered withby the bobbins. of any other compartment. 'VVhile- I have shown theadjacent walls of each pair of compartments as pivoted, yet do not wishto be limited to this construction and it is to be understood that themovable walls may be formed either as shown in Fig. 1 or in Fig. 5.

vHaving thus described my invention, it will be apparent that changesand mod'ifica tions may be made therein by those skilled in the artwithout departing from the'spirit and scope of the invention and I donot wish to be'limi'ted to the details herein disclosed, but what Iclaim is 1. In a weft replenishing mechanism for looms, a. compartmentto holdreserve bobbins as they await movement toward transfer position,a pivotal-1y mounted wall forming one side of the compartment andextending adjacent thev reserve bobbins, and means under control of thereplenishingmechanism to move said wall about the pivot therefor to varythe width of the compartment.

2. In a weft replenishing mechanism for looms, a compartment to holdreservebobbins as they await movement toward transfer position, apivotally mounted wall forming one side of said compartment andextending adjacent the reserve bobbins, and means to move said wallabout the pivot therefor into and out of contact with the bobbins.

3-. In a weft replenishing mechanism for looms, a compartment to holdreserve bobbins as they await movement toward transfer position, apivotal member defining one side of the compartment and extendingadjacent the reserve bobbins, and means under control of the weftreplenishing mechanism to move said member into engagement with thebobbins in the compartment.

4. In a weft replenishing mechanism for looms, a bobbin compartment tohold reserve bobbins as they await movement toward transfer position, afixed wall for the.

compartment, a rigid pivoted wall movable about the pivot thereof in avertical plane and normally held toward the fixed wall and extendingadjacent the reserve bobbins, and means under control of thereplenishing mechanism to move said pivoted wall away from the fixedwall.

5. In a. weft replenishing mechanism for looms, a bobbin compartmenthaving a fixed wall, a movable wall pivoted at. the lower end thereof tothe replenishing mechanism and having the upper end thereof yieldinglyheld toward the fixed wall, and connections from the replenishingmechanism to move said pivoted wall away from the fixed wall.

6. In a weft replenishing mechanism for looms, a bobbin compartment, amovable wall for the compartment normally held in contact with thebobbins and having depressions formed therein to receive portions of thebobbins, and replenishing mechanism controlled means to move said wallout of contact with the bobbins.

7. In a weft replenishing mechanism for looms, a bobbin compartment, awall for said compartment pivoted at the lower end thereof, and havingformed therein a series of depressions, each depression adapted toreceive portions of a bobbin, and replenishing mechanism actuated meansfor controlling the position of said wall.

8. Ina weft replenishing mechanismfor looms, a bobbin compartment, amovable.

wall for said compartmentpivoted atone end thereof to the replenishingmechanism and having formed therein depressionswhich vary in depthaccording to the distance ofthe-depression from the pivot, said wallbeing normally .held against the bobbins to restrain rotation thereofand said depresslons receiving portlons of the bobblns,

and replenishing mechanism actuated means I the frame to limit themovement of the movable wall.

10. In a weft replenishing mechanism for looms, a bobbin compartmenthaving a fixed wall, a pivotally mounted rigid wall for the compartmentnormally held toward the fixed replenishing mechanism for walland havingformed therein a series of I depressions which divide the maincompartment into a plurality of sub-compartments each of which isadapted to receive a bobbin, and means under control of the replenishingmechanism to move said pivoted Wall away from the fixed wall so that thebobbins may fall successively through the various sub-compartments. I

11. In a weft replenishing mechanism for looms, a bobbin compartmenthaving a fixed wall, a pivotally mounted wall for thecompartmentnormally held toward the fixed wall and having depressions formedtherein to receive portions of the bobbins, the portion of the pivotedwallin which the depressions are formed being provided with a yieldingcompressible material, and means under control of the replenishingmechanism V to move said pivoted Wall with respect to the fixed wall;

In testimony aflixed my signature.

OSCAR w. RICHARDSON.

whereof I have hereunto

